[M]Material, spindle: JIS−SKS (TS for cold work), knob: Free Cutting Steel, nuts and screws: low cadmium brass
[A]Accessory: specialized wrench
[ ! ] The drawing shows the micrometer in stroke center state. [ ! ] Micrometer has a bolt/nut system, so the total length does not change. [ ! ] Ratchet function is not available.